The Cassette Pi is a self-contained real-time notification scroller, all housed neatly inside a transparent cassette tape. A Raspberry Pi Zero is sandwiched between the two tape reels, retrieving Internet of Things notifications from the fabulous IFTTT service, delivered almost instantly to the Pi via an Adafruit.IO feed and a Python script. The whole cassette vibrates to alert you to the incoming notification, and the text is then scrolled clearly across a Pimoroni 11×7 LED display.
Everything is powered by a 150mAh LiPo battery, connected to the Pi via a LiPo Shim – also within the cassette is an Adafruit Micro Lipo so when the battery runs low it can be plugged directly into a Micro USB power source to grab some juice.
The most fun part is that thanks to some trimming of the Pi itself, the cassette can still fit inside any vintage tape player, turning that old ornament into a functional and classy Internet of Things device.
The Cassette Pi is perfect for use as a conference badge too, dangling from a lanyard and scrolling your name or a custom message – I hope to wear it to a Pi event or jam later this year.
This is probably my favourite Pi project to date, everything went smoothly for once and I love the final result, it’s a very tactile little thing. It was built in a bit of a hurry so that I could enter the Instructables Raspberry Pi contest 2020 – at the time of writing the results haven’t been published but I’m hopeful of winning at least a T-shirt prize pack.
Very excited to have a project in issue 90 of the MagPi magazine this month! There’s a lovely 4-page feature on the WeatherMan Pi , a 1980s cassette player that now displays weather info. on an LED matrix.
I built this project late last year and amazingly it’s still running, sitting on my desk every day and jiggling its earphones occasionally when the weather changes. The only problem I had was a few weeks back when the “current conditions” animation stopped working, then I realised I hadn’t included one for “Wind” – easily fixed.
I’d also half-expected the headphone assembly to fall apart by now, with all the spinning it does some days, but it turns out Sugru is stronger than I thought, good to know for future projects.
The MagPi’s a great read this month, all the usual Pi goodness plus a nice review of Pimoroni’s latest Pirate Audio HAT, I’m building a project with one of these at the moment and can confirm it’s awesome.
There’s also a helpful guide to building a Magic Mirror, something I’ve not tried yet, though I do have a stack of two-way mirror film left over from my Neon Infinity TV project so could well be tempted!
Issue 90 is on sale now in shops and available as a free .pdf download. You don’t get the free Raspberry Pi 4 cooling stand with the .pdf version though obviously!
A walkman that displays the weather, the WeatherMan! Pi Zero smarts, LED icons, Dark Sky data and jiggling servo controlled headphones.
The WeatherMan Pi is an ambient weather display with early 80s style – animated weather icons, scrolling temperature text and graphical rainfall probability are displayed on a Pimoroni Unicorn HAT HD LED matrix, showing brightly through what was originally the cassette window.
When weather conditions change the servo-controlled headphones on top sweep back & forth to alert you.
Open up the magnet-latched cassette door and the Raspberry Pi zero and components are revealed for easy servicing, all held securely in place with Sugru mouldable glue. The weather data is sourced from the ultra-accurate Dark Sky API, and the data is refreshed every few minutes.
This project was a lot of fun and only took a couple of weeks – the full build is documented below:
I was toying with the idea of a Halloween themed build a few weeks back but was stuck for ideas, then I came across an awesome fencing mask in a charity shop, and the idea for Dr. Tape Head was born!
I had a pretty clear idea from the start what I wanted – moving laser eyes, smoke generation and some kind of text to speech function to bring the whole thing to life.
I started by building the individual parts – eyes (ping pong balls with lasers and LEDs, cased in Lego) , ears (old headphones with speakers added) and mouth (cassette tape with pHAT Beat). I then built these into the mask, pulling together the code I needed to control them on the Raspberry Pi.
Next I cobbled together a Python script on the Pi to read text from a Google Sheets spreadsheet, then set this up to be auto-populated from the IFTTT service. This meant that the doctor would read out real-time notifications from the web, as well as messages sent directly to him via SMS or Google Assistant.
Later I just had time to add finishing touches, with hair made from dismantled cassette tapes and an old mannequin hacked about to allow for clothing and a hidden power supply.
Getting the doctor up & running was a really fun project – quite time pressured but great to jump on the Halloween bandwagon and work to a theme, i.e. spooky!
This beautiful little “Flirt” transistor radio from 1970 has had a loving internet radio conversion using a Raspberry Pi Zero. All the original controls have been re-used and with its LiPo battery & LED VU meter it’s ready to bang out tunes in the bathroom.
This could be one of my favourite projects ever, it has just the right combination of Old Tech and New Spec, and was my quickest to date, providing music in the bathroom just a week after I picked it up at the car boot.
As ever I learned new things while building it, including re-using parts of the volume dial to make microswitches that look identical to the original controls – definitely a technique I’ll be using in future projects.
I also used a LiPo battery for the first time in this build, something I’ve been shy of in the past, and was pleasantly surprised with the resulting flexibility and impressive run-time. Using a combination of the Pimoroni LiPo Shim and an Adafruit Micro LiPo I was able to integrate the charging circuit into the build itself, pleasingly tucked away under the original battery lid.
This Cheetah 125 joystick from the 1980s has had a full rebuild with shiny new microswitches, arcade buttons and a Pimoroni Player X controller board. It now has four independent buttons and connects via USB, ready for some serious RetroPie gaming action.
We had great fun converting this old joystick to work on RetroPie – it really brought back the glory days of “gaming” on my old Commodore Vic 20, I had exactly the same model when it was new.
The build wasn’t without surprises though, I’d forgotten that in the 80s all buttons performed the same function – four in this case all wired together! With the help of a Player X board from Pimoroni we were able to make each button independent, and added in a couple of extras to make RetroPie play easier.
The idea behind the joystick conversion was to provide Player 2 controls for the Pi Tourer Game Console, and it’s now added all the blood-pumping fun of head-to-head competition to our retro gaming, with predictable gloating from the younger members of the household!
This 1963 Ever Ready car radio now has a new life playing RetroPie games!
It has a Raspberry Pi 3 and Picade controller inside, as well as a Pimoroni Blinkt that makes the front panel glow brightly in a range of colours, depending on what emulator is playing.
The fun doesn’t stop there though, thanks to its inbuilt handle and easy docking ports the Pi Tourer can be carried to other rooms, friends’ houses or anywhere a spare HDMI port can be found.
I couldn’t resist this 1963 radio at the car boot earlier in the year – it cost a princely £4. It was obviously not your normal car stereo however, as the underside had its own inbuilt speaker.
Research showed it had been a dual-purpose device, so you could remove it from your car and use it just like a normal portable radio. I decided to recreate this function, making it so it could “dock” with the workbench but still be easily removed and carried around to other retro gaming locations.
This project was as much fun to build as it is to play with, you can read the full story on Instructables and Hackster. The code I used to control the Blinkt colours based on the RetroPie emulator selection is all documented on GitHub.
For once this project turned out exactly as planned, there was just enough space in the case and I didn’t have to compromise on features. There’s one thing missing though – controls for Player 2! RetroPie is a ton of fun but playing against the kids takes it to another level altogether, apart from when they beat me, which is most of the time. For the next project we’re going to be building a controller for Player 2, upgrading an original 80s joystick and making it RetroPie-Ready.
Stay tuned for updates on that and be sure to subscribe on YouTube to catch the video when it’s released, probably around the 1st of September.
You can get downloadable .pdf versions at the links above, but we just love the browsability of the printed magazines.
The MagPi has a great feature on the shiny new Raspberry Pi 4, lots of excitement about that here and hopefully a “monster” themed build using a Pi 4 4GB coming from us in the Autumn.
HackSpace is holding its own in the coffee table stakes though, the article on re-purposing aluminium cans went down especially well. Maybe because they’re so readily available in this household? Who knows.
This iconic digital clock from the 1970s now has a new life stylishly displaying YouTube statistics. It’s powered by a Raspberry Pi Zero and harnesses a simple Python script to retrieve Subscriber and View numbers for the Old Tech. New Spec. channel from the YouTube Data API, displaying the results on a Pimoroni Inky pHAT display.
The clock’s original alarm on/off switch now toggles the e-ink display between Views and Subscribers, and an inbuilt LED glows up the translucent red plastic around the display as it updates.
It’s a fun & practical addition to my office, sitting quietly on my desk speaker, and seeing the stats slowly increase helps keep me motivated to make more projects and videos. It also won First Prize in the recent Instructables Internet of Things Contest!
I bought this clock a year or two back, bundled with an old robot toy, and it was in daily use until it went pop recently – when it joined the ranks of broken Old Tech in the workshop awaiting conversion. The build was straightforward and involved a lot of precise measuring, as well as my favourite Raspberry Pi companion, Lego bricks!
I’m really pleased with the result and it’s a lovely looking little thing – nice coverage on the Hackster Blog too!